nrpe_vms is an OpenVMS version of the nrpe (Nagios Remote Plugin Executor) daemon for unix-like operation systems. It provides methods to execute Nagios service checks on an OpenVMS system and report the results back to your Nagios host

OpenVMS O'Tools provides an infrastructure for user-developed open-source tools for the OpenVMS operating system from Digital/Compaq/Hewlett-Packard. Useful library functions, sysadmin tools, etc. -- all are grist to the O'Tool mill.